The strategy here is to create triangles such that one of the atoms cycles through different possibilities from the Berlo, and only the one with earth goes into the output. Started by using two arms to shuffle the input molecule around, and the hardest part was getting arm 4 to carry the debonded two atom stick away at the right time. Finally reached a setup that produces an output once every 65 periods, and turning the Berlo once every period nicely cycles through all 6 elements.